Lowest Student–Teacher Ratio in Ontario (2025)

Schools with the fewest students per FTE teacher, among schools with at least 100 students. Ranked by the Success Index (US) from official American data; 34 schools in Ontario, California. Rank positions shown on each profile are within United States and California.

#	School	Sector	Students per teacher	Success Index (US)	Key result	Students
1	De Anza Middle Ontario · Middle · Grades 7–8	Public	15.9	22.0 Lower 50%	26% Math proficiency	510
2	Vina Danks Middle Ontario · Middle · Grades 7–8	Public	16.5	23.3 Lower 50%	23% Math proficiency	544
3	Ray Wiltsey Middle Ontario · Middle · Grades 6–8	Public	17.7	20.0 Lower 50%	25% Math proficiency	727
4	Woodcrest Junior High Ontario · Middle · Grades 7–8	Public	18.0	32.5 Lower 50%	34% Math proficiency	324
5	El Camino Elementary Ontario · Elementary · Grades K–6	Public	18.3	21.0 Lower 50%	29% Math proficiency	476
6	Lincoln Elementary Ontario · Elementary · Grades K–6	Public	18.9	26.3 Lower 50%	37% Math proficiency	530
7	Ontario Center Ontario · Elementary · Grades K–5	Public	20.2	28.1 Lower 50%	31% Math proficiency	585
8	Sultana Elementary Ontario · Elementary · Grades K–6	Public	20.3	33.7 Lower 50%	41% Math proficiency	589
9	Euclid Elementary Ontario · Elementary · Grades K–6	Public	21.2	25.3 Lower 50%	35% Math proficiency	572
10	Arroyo Elementary Ontario · Elementary · Grades K–8	Public	21.4	23.1 Lower 50%	29% Math proficiency	493
11	Del Norte Elementary Ontario · Elementary · Grades K–6	Public	21.4	21.2 Lower 50%	30% Math proficiency	428
12	Oaks Middle Ontario · Middle · Grades 7–8	Public	21.5	28.8 Lower 50%	31% Math proficiency	668
13	Mariposa Elementary Ontario · Elementary · Grades K–6	Public	21.5	15.4 Lower 50%	24% Math proficiency	537
14	Grace Yokley Junior High Ontario · Middle · Grades 7–8	Public	21.6	38.8 Lower 50%	33% Math proficiency	606
15	Ontario High Ontario · High · Grades 9–12	Public	21.9	28.1 Lower 50%	27% Math proficiency	1,994
16	Ranch View Elementary Ontario · Elementary · Grades K–6	Public	22.4	50.5 Top 50%	48% Math proficiency	738
17	Elderberry Elementary Ontario · Elementary · Grades K–6	Public	22.7	37.7 Lower 50%	52% Math proficiency	544
18	Berlyn Elementary Ontario · Elementary · Grades K–6	Public	22.8	13.4 Lower 50%	22% Math proficiency	639
19	Corona Elementary Ontario · Elementary · Grades K–6	Public	23.0	25.9 Lower 50%	38% Math proficiency	414
20	Mountain View Elementary Ontario · Elementary · Grades K–6	Public	23.5	35.2 Lower 50%	36% Math proficiency	564
21	Chaffey High Ontario · High · Grades 9–12	Public	23.5	24.8 Lower 50%	20% Math proficiency	3,127
22	Creek View Elementary Ontario · Elementary · Grades K–6	Public	23.6	29.0 Lower 50%	30% Math proficiency	566
23	Richard Haynes Elementary Ontario · Elementary · Grades K–6	Public	23.7	24.9 Lower 50%	34% Math proficiency	641
24	Mission Elementary Ontario · Elementary · Grades K–6	Public	23.8	25.7 Lower 50%	37% Math proficiency	571
25	Vista Grande Elementary Ontario · Elementary · Grades K–6	Public	23.9	42.6 Lower 50%	49% Math proficiency	358
26	Bon View Elementary Ontario · Elementary · Grades K–6	Public	23.9	18.4 Lower 50%	27% Math proficiency	598
27	Liberty Elementary Ontario · Elementary · Grades K–6	Public	24.1	44.6 Lower 50%	51% Math proficiency	578
28	Park View Elementary Ontario · Elementary · Grades K–6	Public	24.8	49.8 Lower 50%	34.4% Free/reduced-price lunch	844
29	Hawthorne Elementary Ontario · Elementary · Grades K–6	Public	25.0	22.9 Lower 50%	29% Math proficiency	549
30	Central Language Academy Ontario · Elementary · Grades K–8	Public	25.4	31.8 Lower 50%	27% Math proficiency	736
31	Vineyard Elementary Ontario · Elementary · Grades K–8	Public	25.5	29.9 Lower 50%	36% Math proficiency	562
32	Levi H. Dickey Elementary Ontario · Elementary · Grades K–6	Public	25.8	17.7 Lower 50%	23% Math proficiency	413
33	Colony High Ontario · High · Grades 9–12	Public	26.0	38.7 Lower 50%	35% Math proficiency	2,109
34	Edison Elementary Ontario · Elementary · Grades K–8	Public	26.3	54.8 Top 50%	60% Math proficiency	736

De Anza Middle in Ontario leads the 2025 list of lowest student–teacher ratio in Ontario with Students per teacher 15.9. Of the 34 schools shown, 34 are public.

For the full picture see the wider California lowest student–teacher ratio rankings, every school on the Ontario page, or the comparison tool to put a shortlist side by side.

Free academic assessment

Is your child on grade level in reading and math?

Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.

Personalised learning plan mapped to the Australian Curriculum
English & Maths from Kindergarten to Year 12
Flexible memberships, no lock-in contracts
Centres across NSW, VIC, QLD, WA, SA and ACT

Frequently asked questions

What is the best ratio school in Ontario?

De Anza Middle in Ontario, California ranks first among lowest student–teacher ratio in Ontario with Students per teacher 15.9 (Enrollment: 510).

How are lowest student–teacher ratio in Ontario ranked?

Schools with the fewest students per FTE teacher, among schools with at least 100 students. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.